XML 68 R53.htm IDEA: XBRL DOCUMENT v3.3.1.900
Commitments, Contingencies And Guarantees (Narrative) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Commitments And Contingencies [Line Items]      
Rent expense $ 1,140 $ 1,170 $ 1,160
Performance Requirements [Member]      
Commitments And Contingencies [Line Items]      
Estimated Maximum Contingency $ 30