Fair Value (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Recurring Fair Value Measures [Table Text Block]

	Fair Value as of March 31, 2022
Recurring Fair Value Measures	Level 1	Level 2	Level 3	Total
Millions
Assets
Investments (a)
Available-for-sale – Equity Securities	$8.9	—	—	$8.9
Available-for-sale – Corporate and Governmental Debt Securities (b)	—	$5.5	—	5.5
Cash Equivalents	3.4	—	—	3.4
Total Fair Value of Assets	$12.3	$5.5	—	$17.8
Liabilities
Deferred Compensation (c)	—	$16.5	—	$16.5
Total Fair Value of Liabilities	—	$16.5	—	$16.5
	Fair Value as of December 31, 2021
Recurring Fair Value Measures	Level 1	Level 2	Level 3	Total
Millions
Assets
Investments (a)
Available-for-sale – Equity Securities	$8.9	—	—	$8.9
Available-for-sale – Corporate and Governmental Debt Securities	—	$6.2	—	6.2
Cash Equivalents	2.5	—	—	2.5
Total Fair Value of Assets	$11.4	$6.2	—	$17.6
Liabilities
Deferred Compensation (c)	—	$18.0	—	$18.0
Total Fair Value of Liabilities	—	$18.0	—	$18.0

(a)Included in Other Non-Current Assets on the Consolidated Balance Sheet.

(b)As of March 31, 2022, the aggregate amount of available-for-sale corporate and governmental debt securities maturing in one year or less was $0.8 million, in one year to less than three years was $2.7 million, in three years to less than five years was $1.5 million and in five or more years was $0.5 million.

(c)Included in Other Non-Current Liabilities on the Consolidated Balance Sheet.

Fair Value, by Balance Sheet Grouping [Table Text Block]

Financial Instruments	Carrying Amount	Fair Value
Millions
Short-Term and Long-Term Debt (a)
March 31, 2022	$1,956.1	$1,962.9
December 31, 2021	$1,986.4	$2,192.6

(a)Excludes unamortized debt issuance costs.