XML 48 R38.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Financial Instruments - Additional Information (Detail) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2017 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Estimated amount reclassified from other comprehensive income to interest expense | $ 8

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration