Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 1,180	$ 1,099		$ 1,116
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	50	39		37
Pension, health and life insurance contributions	(44)	(43)		(42)
Pension, health and life insurance benefits expense	36	44		28
Deferred income taxes	(42)	(11)		(15)
Share-based compensation	18	20		16
Excess tax benefits from share-based arrangements	(13)	(11)		(4)
Changes in operating assets and liabilities:
Accounts and other receivables	(7)	(8)		1
Inventories	(89)	(118)
Accounts payable and accrued liabilities	20	64		(33)
Settlement costs	41	32		91
Income taxes	36	59		(6)
Other current assets	3	5		(10)
Other assets	3	(1)		4
Net cash provided by (used in) operating activities	1,192	1,170		1,183
Cash flows from investing activities:
Purchases of investments	(276)
Business acquisition	(46)	(135)	[1]
Additions to plant and equipment	(62)	(74)		(56)
Sales, maturities and calls of investments	26	0
Net cash provided by (used in) investing activities	(358)	(209)		(56)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	500	500		750
Dividends paid	(823)	(807)		(723)
Shares repurchased	(795)	(578)		(1,586)
Debt issuance costs	(4)	(5)		(9)
Proceeds from exercise of stock options	9	5		8
Excess tax benefits from share-based arrangements	13	10		4
Net cash provided by (used in) financing activities	(1,100)	(875)		(1,556)
Effect of foreign currency rate changes on cash and cash equivalents
Change in cash and cash equivalents	(266)	86		(429)
Cash and cash equivalents, beginning of year	1,720	1,634		2,063
Cash and cash equivalents, end of year	1,454	1,720		1,634
Parent
Cash flows from operating activities:
Net income	1,180	1,099		1,116
Adjustments to reconcile to net cash provided by operating activities:
Equity income from subsidiaries	(1,180)	(1,100)		(1,115)
Deferred income taxes	(1)	1
Share-based compensation	1	1
Changes in operating assets and liabilities:
Accounts and other receivables				(1)
Accounts payable and accrued liabilities	(1)			12
Income taxes	2	(1)
Return on investment in subsidiaries	1,913	1,495		1,730
Net cash provided by (used in) operating activities	1,914	1,495		1,742
Cash flows from investing activities:
Business acquisition		(125)	[1]
Investment in subsidiary	(105)	(70)
Net cash provided by (used in) investing activities	(105)	(195)		252
Return of capital				252
Cash flows from financing activities:
Proceeds from issuance of long-term debt				387
Dividends paid	(823)	(807)		(723)
Shares repurchased	(795)	(578)		(1,586)
Net cash provided by (used in) financing activities	(1,618)	(1,385)		(1,922)
Effect of foreign currency rate changes on cash and cash equivalents
Change in cash and cash equivalents	191	(85)		72
Cash and cash equivalents, beginning of year	150	235		163
Cash and cash equivalents, end of year	341	150		235
Issuer
Cash flows from operating activities:
Net income	1,182	1,100		1,115
Adjustments to reconcile to net cash provided by operating activities:
Equity income from subsidiaries	(690)	(661)		(659)
Depreciation and amortization	44	38		37
Pension, health and life insurance contributions	(44)	(43)		(42)
Pension, health and life insurance benefits expense	36	44		28
Deferred income taxes	(39)	(10)		(16)
Share-based compensation	17	19		16
Excess tax benefits from share-based arrangements	(13)	(11)		(4)
Changes in operating assets and liabilities:
Accounts and other receivables	(8)	877		(873)
Inventories	(43)	(92)
Accounts payable and accrued liabilities	37	50		(37)
Settlement costs	41	32		91
Income taxes	54	43		(2)
Other current assets	(1)	13		(10)
Other assets	3	(1)		(170)
Return on investment in subsidiaries	661	550		1,212
Net cash provided by (used in) operating activities	1,237	1,948		686
Cash flows from investing activities:
Purchases of investments	(276)
Additions to plant and equipment	(61)	(74)		(56)
Sales, maturities and calls of investments	26
Net cash provided by (used in) investing activities	(311)	(74)		(56)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	500	500		750
Dividends paid	(1,913)	(1,495)		(1,982)
Debt issuance costs	(4)	(5)		(9)
Proceeds from exercise of stock options	9	5		8
Excess tax benefits from share-based arrangements	13	10		4
Net cash provided by (used in) financing activities	(1,395)	(985)		(1,229)
Effect of foreign currency rate changes on cash and cash equivalents
Change in cash and cash equivalents	(469)	889		(599)
Cash and cash equivalents, beginning of year	1,471	582		1,181
Cash and cash equivalents, end of year	1,002	1,471		582
Non-guarantor Subsidiaries
Cash flows from operating activities:
Net income	688	661		659
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization	6	1
Deferred income taxes	(2)	(2)		1
Changes in operating assets and liabilities:
Accounts and other receivables	(16)	(10)		(2)
Inventories	(46)	(26)
Accounts payable and accrued liabilities	1	(861)		869
Income taxes	(20)	17		(4)
Other current assets	4	(8)
Other assets				(213)
Net cash provided by (used in) operating activities	615	(228)		1,310
Cash flows from investing activities:
Business acquisition	(46)	(135)	[1]
Additions to plant and equipment	(1)
Net cash provided by (used in) investing activities	(47)	(135)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		125
Dividends paid	(661)	(550)		(1,212)
Contributions from parent	105	70
Net cash provided by (used in) financing activities	(556)	(355)		(1,212)
Effect of foreign currency rate changes on cash and cash equivalents
Change in cash and cash equivalents	12	(718)		98
Cash and cash equivalents, beginning of year	99	817		719
Cash and cash equivalents, end of year	111	99		817
Total Consolidating Adjustments
Cash flows from operating activities:
Net income	(1,870)	(1,761)		(1,774)
Adjustments to reconcile to net cash provided by operating activities:
Equity income from subsidiaries	1,870	1,761		1,774
Changes in operating assets and liabilities:
Accounts and other receivables	17	(875)		877
Accounts payable and accrued liabilities	(17)	875		(877)
Other assets				387
Return on investment in subsidiaries	(2,574)	(2,045)		(2,942)
Net cash provided by (used in) operating activities	(2,574)	(2,045)		(2,555)
Cash flows from investing activities:
Business acquisition		125	[1]
Investment in subsidiary	105	70
Net cash provided by (used in) investing activities	105	195		(252)
Return of capital				(252)
Cash flows from financing activities:
Proceeds from issuance of long-term debt		(125)		(387)
Dividends paid	2,574	2,045		3,194
Contributions from parent	(105)	(70)
Net cash provided by (used in) financing activities	2,469	1,850		2,807
Effect of foreign currency rate changes on cash and cash equivalents

[1] $125 million reflected as cash flows used by Parent consists of a loan from Parent to a Non-guarantor Subsidiary.