Long-Term Debt (Parenthetical) (Detail)	0 Months Ended	12 Months Ended
	Oct. 30, 2012	Dec. 31, 2014	Oct. 30, 2012
1.375% Notes Due 2018
Debt Instrument [Line Items]
Debt instrument interest rate	1.375%	1.375%	1.375%
Debt instrument maturity date	2018	2018
4.40% Notes Due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		4.40%
Debt instrument maturity date		2021
2.875% Notes Due 2016
Debt Instrument [Line Items]
Debt instrument interest rate		2.875%
Debt instrument maturity date		2016
6.70% Notes Due 2026
Debt Instrument [Line Items]
Debt instrument interest rate		6.70%
Debt instrument maturity date		2026