Derivative Instruments - Schedule of Series of Forward Starting Swaps Each with a Term of One Year (Detail)	Oct. 03, 2015 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	$ 3,339,000,000
Year 2015 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	1,010,000,000
Year 2016 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	697,000,000
Year 2017 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	544,000,000
Year 2018 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	544,000,000
Year 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	272,000,000
Year 2020 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional balance of outstanding contracts	$ 272,000,000