Consolidating Guarantor Financial Information (Schedule of Consolidating Statement of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 147	$ 215
Investing activities
Capital expenditures on property, plant and equipment	(74)	(106)
Acquisitions, net of cash acquired	0	(23)
Proceeds from sale of businesses and assets, net	0	0
Deferred proceeds from Kelsterbach plant relocation	0	0
Capital expenditures related to Kelsterbach plant relocation	(3)	(21)
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(10)	(5)
Net cash provided by (used in) investing activities	(87)	(155)
Financing activities
Short-term borrowings (repayments), net	(19)	10
Proceeds from short-term borrowings	24	24
Repayments of short-term borrowings	(24)	(24)
Proceeds from long-term debt	50	0
Repayments of long-term debt	(55)	(8)
Refinancing costs	0	0
Purchases of treasury stock, including related fees	0	(20)
Dividends to parent	0	0
Contributions from parent	0	0
Stock option exercises	1	7
Series A common stock dividends	(12)	(10)
Return of capital to parent	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(35)	(21)
Exchange rate effects on cash and cash equivalents	(6)	6
Net increase (decrease) in cash and cash equivalents	19	45
Cash and cash equivalents as of beginning of period	959	682
Cash and cash equivalents as of end of period	978	727
Parent Guarantor [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	1	23
Investing activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net	0	0
Deferred proceeds from Kelsterbach plant relocation	0	0
Capital expenditures related to Kelsterbach plant relocation	0	0
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	0	0
Net cash provided by (used in) investing activities	0	0
Financing activities
Short-term borrowings (repayments), net	0	0
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	0
Repayments of long-term debt	0	0
Refinancing costs	0	0
Purchases of treasury stock, including related fees	0	(20)
Dividends to parent	0	0
Contributions from parent	0	0
Stock option exercises	1	7
Series A common stock dividends	(12)	(10)
Return of capital to parent	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(11)	(23)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	(10)	0
Cash and cash equivalents as of beginning of period	10	0
Cash and cash equivalents as of end of period	0	0
Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(18)	(3)
Investing activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net	0	0
Deferred proceeds from Kelsterbach plant relocation	0	0
Capital expenditures related to Kelsterbach plant relocation	0	0
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	1	1
Other, net	0	0
Net cash provided by (used in) investing activities	1	1
Financing activities
Short-term borrowings (repayments), net	20	28
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	0
Repayments of long-term debt	(2)	(3)
Refinancing costs	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(1)	(23)
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	17	2
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	0	0
Subsidiary Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	90	135
Investing activities
Capital expenditures on property, plant and equipment	(41)	(54)
Acquisitions, net of cash acquired	0	(23)
Proceeds from sale of businesses and assets, net	0	0
Deferred proceeds from Kelsterbach plant relocation	0	0
Capital expenditures related to Kelsterbach plant relocation	0	0
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	(3)
Intercompany loan receipts (disbursements)	(20)	(28)
Other, net	(4)	(3)
Net cash provided by (used in) investing activities	(65)	(111)
Financing activities
Short-term borrowings (repayments), net	(9)	2
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	50	0
Repayments of long-term debt	(15)	(1)
Refinancing costs	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	(1)	(23)
Contributions from parent	0	0
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	25	(22)
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	50	2
Cash and cash equivalents as of beginning of period	275	133
Cash and cash equivalents as of end of period	325	135
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	76	106
Investing activities
Capital expenditures on property, plant and equipment	(33)	(52)
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net	0	0
Deferred proceeds from Kelsterbach plant relocation	0	0
Capital expenditures related to Kelsterbach plant relocation	(3)	(21)
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	0
Intercompany loan receipts (disbursements)	0	0
Other, net	(6)	(2)
Net cash provided by (used in) investing activities	(42)	(75)
Financing activities
Short-term borrowings (repayments), net	(10)	7
Proceeds from short-term borrowings	24	24
Repayments of short-term borrowings	(24)	(24)
Proceeds from long-term debt	0	0
Repayments of long-term debt	(39)	(4)
Refinancing costs	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	0	0
Contributions from parent	0	3
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(49)	6
Exchange rate effects on cash and cash equivalents	(6)	6
Net increase (decrease) in cash and cash equivalents	(21)	43
Cash and cash equivalents as of beginning of period	674	549
Cash and cash equivalents as of end of period	653	592
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(2)	(46)
Investing activities
Capital expenditures on property, plant and equipment	0	0
Acquisitions, net of cash acquired	0	0
Proceeds from sale of businesses and assets, net	0	0
Deferred proceeds from Kelsterbach plant relocation	0	0
Capital expenditures related to Kelsterbach plant relocation	0	0
Return of capital from subsidiary	0	0
Contributions to subsidiary	0	3
Intercompany loan receipts (disbursements)	19	27
Other, net	0	0
Net cash provided by (used in) investing activities	19	30
Financing activities
Short-term borrowings (repayments), net	(20)	(27)
Proceeds from short-term borrowings	0	0
Repayments of short-term borrowings	0	0
Proceeds from long-term debt	0	0
Repayments of long-term debt	1	0
Refinancing costs	0	0
Purchases of treasury stock, including related fees	0	0
Dividends to parent	2	46
Contributions from parent	0	(3)
Stock option exercises	0	0
Series A common stock dividends	0	0
Return of capital to parent	0	0
Other, net	0	0
Net cash provided by (used in) financing activities	(17)	16
Exchange rate effects on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents as of beginning of period	0	0
Cash and cash equivalents as of end of period	$ 0	$ 0