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Aggregate Maturities of Debt and Capital Leases Based on Stated Contractual Maturities (Detail)
$ in Millions
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]  
2017 $ 1,451
2018 1,144
2019 2,650
2020 658
2021 3,260
Thereafter 5,574
Total $ 14,737