XML 82 R68.htm IDEA: XBRL DOCUMENT v3.7.0.1
Goodwill and intangible assets - Estimated Annual Amortization Expense (Detail)
$ in Millions
Jun. 30, 2017
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2017 $ 209
2018 179
2019 108
2020 98
2021 $ 75