Long-Term Debt (Schedule of Principal Maturities of Long-term Debt) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Principal maturities of long-term debt
Total	$ 5,067.7us-gaap_LongTermDebt	$ 4,468.6us-gaap_LongTermDebt
Term Loan A-4 [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	1,300.0
2018	0
2019	0
Thereafter	0
Total	1,300.0
2017 Notes [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	300.0
2018	0
2019	0
Thereafter	0
Total	300.0
2018 Notes [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	0
2018	250.0
2019	0
Thereafter	0
Total	250.0
2022 Notes [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	700.0
Total	700.0
2023 Notes [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	1,000.0
Total	1,000.0
2024 Notes [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	700.0
Total	700.0
Total [Member]
Principal maturities of long-term debt
2015	0
2016	0
2017	1,600.0
2018	250.0
2019	0
Thereafter	2,400.0
Total	$ 4,250.0

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 3

-Subparagraph (SX 210.12-04.(a))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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