Condensed Consolidating Financial Statements (Details 2) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Cash (Used in) Provided by Operating Activities:
Net income	$ 46.2	$ 159.9	$ 204.3	$ 225.1
Other adjustments			591.3	369.7
Cash provided by operating activities			795.6	594.8
Cash (Used in) Provided by Investing Activities:
Purchases of property and equipment			(481.7)	(385.4)
Proceeds from sales of property and equipment			16.3	12.6
Cash used in acquisitions, net of cash acquired			(28.0)	(0.8)
Cash proceeds from divestitures, net of cash divested			10.4
Change in restricted cash and marketable securities			12.7	(76.0)
Other			(1.9)	0.1
Cash used in investing activities			(472.2)	(449.5)
Cash provided by (used in) financing activities:
Proceeds from notes payable and long-term debt			819.5	1,020.2
Proceeds from issuance of senior notes, net of discount			1,844.9	1,499.4
Payments of notes payable and long-term debt			(2,228.3)	(2,494.8)
Premiums paid on extinguishment of debt			(86.8)	(30.4)
Fees paid to issue and retire senior notes and certain hedging relationships			(58.6)	(20.8)
Issuances of common stock			31.4	34.3
Excess income tax benefit from stock option exercises			2.1	1.8
Purchases of common stock for treasury			(262.9)	(1.4)
Cash dividends paid			(152.5)	(144.9)
Distributions paid to noncontrolling interests				(0.7)
Cash used in financing activities			(91.2)	(137.3)
(Decrease) Increase in Cash and Cash Equivalents			232.2	8.0
Cash and cash equivalents at beginning of period			88.3	48.0
Cash and cash equivalents at end of period	320.5	56.0	320.5	56.0
Parent Company [Member]
Cash (Used in) Provided by Operating Activities:
Net income	46.5	159.7	204.7	224.7
Equity in earnings of subsidiaries, net of taxes			(449.6)	(191.7)
Other adjustments			(277.6)	(67.3)
Cash provided by operating activities			(522.5)	(34.3)
Cash (Used in) Provided by Investing Activities:
Change in restricted cash and marketable securities			10.6	9.4
Change in investment and net advances to affiliate			(817.1)	(1,315.4)
Cash used in investing activities			(806.5)	(1,306.0)
Cash provided by (used in) financing activities:
Proceeds from notes payable and long-term debt			819.5	1,020.2
Proceeds from issuance of senior notes, net of discount			1,844.9	1,499.4
Payments of notes payable and long-term debt			(894.5)	(1,139.7)
Fees paid to issue and retire senior notes and certain hedging relationships			(57.9)	(20.8)
Issuances of common stock			31.4	34.3
Excess income tax benefit from stock option exercises			2.1	1.8
Purchases of common stock for treasury			(262.9)	(1.4)
Cash dividends paid			(152.5)	(144.9)
Cash used in financing activities			1,330.1	1,248.9
(Decrease) Increase in Cash and Cash Equivalents			1.1	(91.4)
Cash and cash equivalents at beginning of period			14.5	101.8
Cash and cash equivalents at end of period	15.6	10.4	15.6	10.4
Guarantors [Member]
Cash (Used in) Provided by Operating Activities:
Net income	100.8	133.6	435.2	180.4
Equity in earnings of subsidiaries, net of taxes			(5.6)	(12.7)
Other adjustments			878.8	357.0
Cash provided by operating activities			1,308.4	524.7
Cash (Used in) Provided by Investing Activities:
Purchases of property and equipment			(470.7)	(378.1)
Proceeds from sales of property and equipment			16.3	12.6
Cash used in acquisitions, net of cash acquired			(28.0)	(0.8)
Cash proceeds from divestitures, net of cash divested			10.4
Change in restricted cash and marketable securities			(0.4)	8.3
Other			(1.9)	0.1
Change in investment and net advances to affiliate				(300.0)
Cash used in investing activities			(474.3)	(657.9)
Cash provided by (used in) financing activities:
Payments of notes payable and long-term debt			(1,333.0)	(1,054.3)
Premiums paid on extinguishment of debt			(86.8)	(30.4)
Fees paid to issue and retire senior notes and certain hedging relationships			(0.7)
Change in investment and net advances from parent			817.1	1,319.7
Cash used in financing activities			(603.4)	235.0
(Decrease) Increase in Cash and Cash Equivalents			230.7	101.8
Cash and cash equivalents at beginning of period			71.1	(62.6)
Cash and cash equivalents at end of period	301.8	39.2	301.8	39.2
Non-Guarantors [Member]
Cash (Used in) Provided by Operating Activities:
Net income	13.2	12.2	21.1	26.0
Equity in earnings of subsidiaries, net of taxes			(1.5)	(1.6)
Other adjustments			(9.9)	80.0
Cash provided by operating activities			9.7	104.4
Cash (Used in) Provided by Investing Activities:
Purchases of property and equipment			(11.0)	(7.3)
Change in restricted cash and marketable securities			2.5	(93.7)
Change in investment and net advances to affiliate				(4.3)
Cash used in investing activities			(8.5)	(105.3)
Cash provided by (used in) financing activities:
Payments of notes payable and long-term debt			(0.8)	(300.8)
Distributions paid to noncontrolling interests				(0.7)
Change in investment and net advances from parent				300.0
Cash used in financing activities			(0.8)	(1.5)
(Decrease) Increase in Cash and Cash Equivalents			0.4	(2.4)
Cash and cash equivalents at beginning of period			2.7	8.8
Cash and cash equivalents at end of period	3.1	6.4	3.1	6.4
Eliminations [Member]
Cash (Used in) Provided by Operating Activities:
Net income	(114.3)	(145.6)	(456.7)	(206.0)
Equity in earnings of subsidiaries, net of taxes			456.7	206.0
Cash (Used in) Provided by Investing Activities:
Change in investment and net advances to affiliate			817.1	1,619.7
Cash used in investing activities			817.1	1,619.7
Cash provided by (used in) financing activities:
Change in investment and net advances from parent			(817.1)	(1,619.7)
Cash used in financing activities			(817.1)	(1,619.7)
Cash and cash equivalents at beginning of period			0	0
Cash and cash equivalents at end of period	$ 0	$ 0	$ 0	$ 0