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Debt (Aggregate Maturities Of Long-Term Debt) (Details) - USD ($)
$ in Millions

Jan. 05, 2017

Dec. 31, 2016

Oct. 01, 2016

Dec. 31, 2015

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

$ (24.5)

Total

$ 5,394.4

^[1]

$ 6,549.5

Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net

(119.9)

Senior Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

(1,130.6)

(24.5)

Senior Notes [Member] | 8.50% Senior notes due 2019

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal in Year Three

^[1]

438.0

Long-Term Debt, Maturities, Repayments of Principal in Year Four

500.0

Debt Instrument, Repurchased Face Amount

(62.0)

Senior Notes [Member] | 6.875% Senior notes due 2020

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal in Year Four

^[1]

680.8

Debt Instrument, Repurchased Face Amount

(219.2)

Long-Term Debt, Maturities, Repayments of Principal in Year Five

900.0

Senior Notes [Member] | 4.70% Senior notes due 2021

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

(817.0)

Long-Term Debt, Maturities, Repayments of Principal in Year Five

^[1]

683.0

Long-Term Debt, Maturities, Repayments of Principal after Year Five

1,500.0

Senior Notes [Member] | 4.50% Senior notes due 2024

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

(1.7)

Long-Term Debt, Maturities, Repayments of Principal after Year Five

623.3

^[1]

625.0

Senior Notes [Member] | 8.00% Senior notes due 2024

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

0.0

^[1]

0.0

Senior Notes [Member] | 5.20% Senior notes due 2025

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

(30.7)

Long-Term Debt, Maturities, Repayments of Principal after Year Five

669.3

^[1]

700.0

Senior Notes [Member] | 7.20% Senior notes due 2027

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

150.0

^[1]

150.0

Senior Notes [Member] | 7.875% Senior notes due 2040

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

300.0

^[1]

300.0

Senior Notes [Member] | 5.75% Senior notes due 2044

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

$ (24.5)

Long-Term Debt, Maturities, Repayments of Principal after Year Five

1,000.5

^[1]

1,025.0

Convertible Debt [Member] | 3.00% Exchangeable senior notes due 2024

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

849.5

^[1]

$ 849.5

Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net

$ (245.2)

Scenario, Forecast [Member]

Debt Instrument [Line Items]

Total

$ 5,076.9

Debt Instrument, Repurchased Amount Paid in Cash

^[2]

332.5

Scenario, Forecast [Member] | 8.50% Senior notes due 2019

Debt Instrument [Line Items]

Debt Instrument, Repurchased Amount Paid in Cash

81.7

Scenario, Forecast [Member] | 6.875% Senior notes due 2020

Debt Instrument [Line Items]

Debt Instrument, Repurchased Amount Paid in Cash

69.4

Scenario, Forecast [Member] | 4.70% Senior notes due 2021

Debt Instrument [Line Items]

Debt Instrument, Repurchased Amount Paid in Cash

181.4

Scenario, Forecast [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

(649.5)

Debt Instrument, Repurchased Face Amount Net of Exchanged Notes

^[3]

317.5

Scenario, Forecast [Member] | Senior Notes [Member] | 8.50% Senior notes due 2019

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal in Year Three

292.2

Debt Instrument, Repurchased Face Amount

^[3]

(145.8)

Scenario, Forecast [Member] | Senior Notes [Member] | 6.875% Senior notes due 2020

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal in Year Four

551.0

Debt Instrument, Repurchased Face Amount

^[3]

(129.8)

Scenario, Forecast [Member] | Senior Notes [Member] | 4.70% Senior notes due 2021

Debt Instrument [Line Items]

Debt Instrument, Repurchased Face Amount

^[3]

(373.9)

Long-Term Debt, Maturities, Repayments of Principal in Year Five

309.1

Scenario, Forecast [Member] | Senior Notes [Member] | 4.50% Senior notes due 2024

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

623.3

Scenario, Forecast [Member] | Senior Notes [Member] | 8.00% Senior notes due 2024

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

332.0

Scenario, Forecast [Member] | Senior Notes [Member] | 5.20% Senior notes due 2025

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

669.3

Scenario, Forecast [Member] | Senior Notes [Member] | 7.20% Senior notes due 2027

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

150.0

Scenario, Forecast [Member] | Senior Notes [Member] | 7.875% Senior notes due 2040

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

300.0

Scenario, Forecast [Member] | Senior Notes [Member] | 5.75% Senior notes due 2044

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

1,000.5

Scenario, Forecast [Member] | Convertible Debt [Member] | 3.00% Exchangeable senior notes due 2024

Debt Instrument [Line Items]

Long-Term Debt, Maturities, Repayments of Principal after Year Five

$ 849.5

[1]	The aggregate principal amount outstanding as of December 31, 2016 excludes net unamortized discounts and debt issuance costs of $119.9 million.
[2]	As of December 31, 2016, the aggregate amount of principal repurchased with cash of $332.5 million, along with associated premiums, was classified as current maturities of long-term debt on our consolidated balance sheet. During the first quarter, we expect to recognize a pre-tax loss on the Exchange Offers of approximately $6.0 million, net of premiums and transaction costs.
[3]	As of December 31, 2016, the aggregate amount of principal repurchased with cash of $332.5 million, along with associated premiums, was classified as current maturities of long-term debt on our consolidated balance sheet.

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-Publisher FASB
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-SubTopic 30
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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