Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Asbestos - Numbers of Open Claims, New Claims and Closed Claims and Average Settlement Per Settled Claim and Case Closed (Detail)

v2.4.0.6
Asbestos - Numbers of Open Claims, New Claims and Closed Claims and Average Settlement Per Settled Claim and Case Closed (Detail)
 12 Months Ended
Mar. 31, 2013
USD ($)
Claim
Mar. 31, 2013
AUD
Claim
Mar. 31, 2012
USD ($)
Claim
Mar. 31, 2012
AUD
Claim
Mar. 31, 2011
USD ($)
Claim
Mar. 31, 2011
AUD
Claim
Mar. 31, 2010
USD ($)
Claim
Mar. 31, 2010
AUD
Claim
Mar. 31, 2009
USD ($)
Claim
Mar. 31, 2009
AUD
Claim
Asbestos Claims [Line Items]                    
Number of open claims at beginning of period 592 592 564 564 529 529 534 534 523 523
Number of new claims 542 542 456 456 494 494 535 535 607 607
Number of closed claims 672 672 428 428 459 459 540 540 596 596
Number of open claims at end of period 462 462 592 592 564 564 529 529 534 534
Average settlement amount per settled claim $ 238,615 231,313 $ 228,361 218,610 $ 193,090 204,366 $ 162,250 190,627 $ 151,300 190,638
Average settlement amount per case closed $ 206,892 200,561 $ 207,019 198,179 $ 163,642 173,199 $ 146,325 171,917 $ 133,530 168,248