Condensed Consolidating Statements Of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Dec. 31, 2012
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	$ 1,083	$ 1,203
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(1)	(165)	(444)
Capital expenditures	(168)	(176)
Purchases of held-to-maturity securities		(160)
Purchases of available-for-sale securities	(43)	(100)
Other, net		95
Net cash used by investing activities	(164)	(506)
Cash flows from financing activities:
Purchases of common stock	(485)	(592)
Dividends paid	(198)	(353)
Proceeds from option exercises	212	111
Other, net	30	28
Net cash used by financing activities	(455)	(806)
Net cash used by discontinued operations	(3)	0
Cash sweep/funding by parent	0	0
Net increase (decrease) in cash and equivalents	461	(109)
Cash and equivalents at beginning of period	3,296	2,649	2,649
Cash and equivalents at end of period	3,757	2,540	3,296
Parent Company [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	(36)	(34)
Cash flows from investing activities:
Business acquisitions, net of cash acquired		0
Capital expenditures		(1)
Purchases of held-to-maturity securities		(160)
Purchases of available-for-sale securities		(64)
Other, net		60
Net cash used by investing activities	2	(165)
Cash flows from financing activities:
Purchases of common stock	(485)	(592)
Dividends paid		(353)
Proceeds from option exercises		111
Other, net	30	22
Net cash used by financing activities	(455)	(812)
Net cash used by discontinued operations	(3)
Cash sweep/funding by parent	973	1,136
Net increase (decrease) in cash and equivalents	481	125
Cash and equivalents at beginning of period	2,248	1,530	1,530
Cash and equivalents at end of period	2,729	1,655
Guarantor Subsidiaries [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	1,182	1,254
Cash flows from investing activities:
Business acquisitions, net of cash acquired		(139)
Capital expenditures		(155)
Purchases of held-to-maturity securities		0
Purchases of available-for-sale securities		(36)
Other, net		35
Net cash used by investing activities	(147)	(295)
Cash flows from financing activities:
Purchases of common stock	0	0
Dividends paid		0
Proceeds from option exercises		0
Other, net	0	(20)
Net cash used by financing activities	0	(20)
Net cash used by discontinued operations	0
Cash sweep/funding by parent	(1,035)	(939)
Net increase (decrease) in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0	0
Cash and equivalents at end of period	0	0
Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	(63)	(17)
Cash flows from investing activities:
Business acquisitions, net of cash acquired		(26)
Capital expenditures		(20)
Purchases of held-to-maturity securities		0
Purchases of available-for-sale securities		0
Other, net		0
Net cash used by investing activities	(19)	(46)
Cash flows from financing activities:
Purchases of common stock	0	0
Dividends paid		0
Proceeds from option exercises		0
Other, net	0	26
Net cash used by financing activities	0	26
Net cash used by discontinued operations	0
Cash sweep/funding by parent	62	(197)
Net increase (decrease) in cash and equivalents	(20)	(234)
Cash and equivalents at beginning of period	1,048	1,119	1,119
Cash and equivalents at end of period	1,028	885
Consolidation, Eliminations [Member]
Condensed Consolidating Financial Information [Line Items]
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Business acquisitions, net of cash acquired		0
Capital expenditures		0
Purchases of held-to-maturity securities		0
Purchases of available-for-sale securities		0
Other, net		0
Net cash used by investing activities	0	0
Cash flows from financing activities:
Purchases of common stock	0	0
Dividends paid		0
Proceeds from option exercises		0
Other, net	0	0
Net cash used by financing activities	0	0
Net cash used by discontinued operations	0
Cash sweep/funding by parent	0	0
Net increase (decrease) in cash and equivalents	0	0
Cash and equivalents at beginning of period	0	0	0
Cash and equivalents at end of period	$ 0	$ 0