Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2013

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Reconciliation Of The Benefit Obligation

The reconciliation of the benefit obligation is as follows:

	Pension Benefits						Other Benefits
	2013			2012			2013			2012
Benefit obligation at beginning of year	$	1,948.5		$	1,851.3		$	623.0		$	651.3
Service cost	14.2			16.4			6.7			6.8
Interest cost	67.8			76.4			22.4			27.5
Actuarial (gain) loss	(129.9		)	129.6			4.8			(28.4		)
Benefits paid	(135.9		)	(125.2		)	(49.4		)	(34.2		)
Benefit obligation at end of year	$	1,764.7		$	1,948.5		$	607.5		$	623.0

Changes In The Fair Value Of Plan Assets

The changes in the fair value of plan assets are as follows:

	Pension Benefits						Other Benefits
	2013			2012			2013			2012
Fair value of plan assets at beginning of year	$	1,817.9		$	1,721.8		$	320.3		$	301.1
Actual return on plan assets	223.4			186.8			37.0			21.9
Employer contributions	38.6			34.5			31.3			38.4
Benefits paid	(135.9		)	(125.2		)	(38.8		)	(41.1		)
Fair value of plan assets at end of year	$	1,944.0		$	1,817.9		$	349.8		$	320.3

Net Amount Included In Consolidated Balance Sheets

The net amount included in the consolidated balance sheets is as follows:

	Pension Benefits						Other Benefits
	2013			2012			2013			2012
Noncurrent assets	$	240.8		$	3.0		$	—		$	—
Current liabilities	(3.5		)	(11.5		)	—			—
Noncurrent liabilities	(58.0		)	(122.1		)	(257.7		)	(302.7		)
Net amount at December 31	$	179.3		$	(130.6	)	$	(257.7	)	$	(302.7	)

Net Amounts Included In Accumulated Other Comprehensive Loss (Income) Not Been Recognized As Components Of Net Periodic Benefit Costs

The net amounts included in accumulated other comprehensive loss (income) that have not been recognized as components of net periodic benefit costs are as follows:

	Pension Benefits						Other Benefits
	2013			2012			2013			2012
Net actuarial loss	$	427.2		$	686.8		$	169.6		$	191.0
Prior service credit	(3.0		)	(3.9		)	(102.4		)	(103.0		)
Net amount before tax at December 31	$	424.2		$	682.9		$	67.2		$	88.0

Schedule Of Assumptions Used In Calculating The Benefit Obligations [Table Text Block]

The weighted-average assumptions used in calculating the benefit obligations for all plans are as follows:

	Pension Benefits				Other Benefits
	2013		2012		2013		2012
Discount rate	4.39	%	3.60	%	4.48	%	3.71	%
Rate of compensation increase	3.00	%	3.50	%	3.00	%	3.50	%
Expected rate of return on plan assets	7.66	%	7.66	%	7.00	%	7.00	%

Components Of Net Periodic Benefit Cost (Credit)

The components of net periodic benefit cost included in the consolidated statements of income are as follows:

	2013			2012			2011
Pension Benefits
Service cost	$	14.2		$	16.4		$	17.3
Interest cost	67.8			76.4			84.7
Expected return on assets	(133.1		)	(134.7		)	(128.2		)
Recognized actuarial loss	28.3			30.5			26.4
Amortization of prior service credit	(0.8		)	(0.8		)	(0.8		)
Settlement loss	11.0			13.8			21.3
Net periodic benefit cost	$	(12.6	)	$	1.6		$	20.7
Other Benefits
Service cost	$	6.7		$	6.8		$	6.3
Interest cost	22.4			27.5			31.4
Expected return on assets	(22.1		)	(21.0		)	(17.3		)
Recognized actuarial loss	11.2			14.1			10.2
Amortization of prior service credit	(13.3		)	(13.3		)	(12.0		)
Net periodic benefit cost	$	4.9		$	14.1		$	18.6

Weighted-Average Assumptions Used In Calculating The Benefit Obligations For All Plans

The weighted-average assumptions used in calculating the net periodic benefit cost for all plans are as follows:

	2013		2012		2011
Pension Benefits
Discount rate	3.60	%	4.29	%	5.15	%
Rate of compensation increase	3.50	%	3.50	%	3.75	%
Expected rate of return on plan assets	7.91	%	8.00	%	8.00	%
Other Benefits
Discount rate	3.71	%	4.36	%	5.24	%
Rate of compensation increase	3.50	%	3.50	%	3.75	%
Expected rate of return on plan assets	7.00	%	7.00	%	6.75	%

Fair Values of Pension Benefit Assets and Other Benefit Assets by Asset Category and Level Inputs

The fair values of our pension benefit assets and other benefit assets at December 31, 2013, excluding $3.9 of cash, investment income receivable and amounts due to/from brokers, by asset category and level inputs, as defined by FASB guidance regarding fair value measurements and disclosures (see Note 7, “Fair Value,” for additional information regarding the definition of level inputs), are as follows:

	Level I		Level II		Level III		Total
December 31, 2013:
Pension Benefit Assets:
Equity securities:
U.S. securities	$	613.8	$	—	$	—	$	613.8
Foreign securities	296.8		—		—		296.8
Mutual funds	37.4		—		—		37.4
Fixed maturity securities:
Government securities	177.9		11.5		—		189.4
Corporate securities	—		272.1		—		272.1
Asset-backed securities	—		127.0		—		127.0
Other types of investments:
Common and collective trusts	—		46.6		—		46.6
Partnership interests	—		—		159.1		159.1
Insurance company contracts	—		—		197.4		197.4
Treasury futures contracts	0.7		—		—		0.7
Total pension benefit assets	$	1,126.6	$	457.2	$	356.5	$	1,940.3
Other Benefit Assets:
Equity securities:
U.S. securities	$	39.0	$	—	$	—	$	39.0
Foreign securities	18.6		—		—		18.6
Mutual funds	4.7		—		—		4.7
Fixed maturity securities:
Government securities	14.3		—		—		14.3
Corporate securities	4.3		9.9		—		14.2
Asset-backed securities	—		11.2		—		11.2
Other types of investments:
Common and collective trusts	—		2.2		—		2.2
Partnership interests	—		—		1.2		1.2
Life insurance contracts	—		—		230.0		230.0
Investment in DOL 103-12 trust	—		14.2		—		14.2
Total other benefit assets	$	80.9	$	37.5	$	231.2	$	349.6

The fair values of our pension benefit assets and other benefit assets at December 31, 2012, excluding $3.2 of cash, investment income receivable and amounts due to/from brokers, by asset category and level inputs, as defined by FASB guidance regarding fair value measurements and disclosures (see Note 7, “Fair Value,” for additional information regarding the definition of level inputs) are as follows:

	Level I			Level II		Level III		Total
December 31, 2012:
Pension Benefit Assets:
Equity securities:
U.S. securities	$	514.3		$	—	$	—	$	514.3
Foreign securities	272.5			—		—		272.5
Mutual funds	30.9			—		—		30.9
Fixed maturity securities:
Government securities	192.1			18.0		—		210.1
Corporate securities	—			240.5		—		240.5
Asset-backed securities	—			138.7		—		138.7
Other types of investments:
Common and collective trusts	—			28.9		—		28.9
Partnership interests	—			—		176.5		176.5
Insurance company contracts	—			—		202.5		202.5
Treasury futures contracts	(0.2		)	—		—		(0.2		)
Total pension benefit assets	$	1,009.6		$	426.1	$	379.0	$	1,814.7
Other Benefit Assets:
Equity securities:
U.S. securities	$	23.2		$	—	$	—	$	23.2
Foreign securities	11.6			—		—		11.6
Mutual funds	36.1			—		—		36.1
Fixed maturity securities:
Government securities	4.3			—		—		4.3
Corporate securities	—			9.2		—		9.2
Asset-backed securities	—			13.8		—		13.8
Other types of investments:
Common and collective trusts	—			2.1		—		2.1
Partnership interests	—			—		1.2		1.2
Life insurance contracts	—			—		203.7		203.7
Investment in DOL 103-12 trust	—			15.1		—		15.1
Total other benefit assets	$	75.2		$	40.2	$	204.9	$	320.3

Reconciliation Of The Beginning And Ending Balances Of Plan Assets Measured At Fair Value Using Level III Inputs

A reconciliation of the beginning and ending balances of plan assets measured at fair value using Level III inputs for the years ended December 31, 2013, 2012 and 2011 is as follows:

	U.S. Equity Securities			Partnership Interests			Insurance Company Contracts			Life Insurance Contracts		Total
Year Ended December 31, 2013:
Beginning balance at January 1, 2013	$	—		$	177.7		$	202.5		$	203.7	$	583.9
Actual return on plan assets:
Relating to assets still held at the reporting date	—			2.2			(5.6		)	26.3		22.9
Purchases	—			15.6			9.5			—		25.1
Sales	—			(35.2		)	(9.0		)	—		(44.2		)
Ending balance at December 31, 2013	$	—		$	160.3		$	197.4		$	230.0	$	587.7
Year Ended December 31, 2012:
Beginning balance at January 1, 2012	$	317.6		$	166.1		$	195.5		$	95.7	$	774.9
Actual return on plan assets:
Relating to assets still held at the reporting date	—			4.5			5.5			13.2		23.2
Purchases	—			14.1			8.8			94.8		117.7
Sales	(317.6		)	(7.0		)	(7.3		)	—		(331.9		)
Ending balance at December 31, 2012	$	—		$	177.7		$	202.5		$	203.7	$	583.9
Year Ended December 31, 2011:
Beginning balance at January 1, 2011	$	429.8		$	153.1		$	188.8		$	—	$	771.7
Actual return on plan assets:
Relating to assets still held at the reporting date	4.8			5.8			2.7			1.0		14.3
Purchases	—			7.6			11.6			94.7		113.9
Sales	(117.0		)	(0.4		)	(7.6		)	—		(125.0		)
Ending balance at December 31, 2011	$	317.6		$	166.1		$	195.5		$	95.7	$	774.9

Estimated Future Payments For Pension Benefits And Postretirement Benefits

Our estimated future payments for pension benefits and postretirement benefits, which reflect expected future service, as appropriate, are as follows:

	Pension Benefits		Other Benefits
2014	$	138.2	$	43.4
2015	147.9		43.5
2016	141.0		43.9
2017	145.6		44.7
2018	148.3		45.4
2019 – 2023	656.5		225.8