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Fair Value (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Recurring Fair Value Measures [Table Text Block]

	Fair Value as of March 31, 2019
Recurring Fair Value Measures	Level 1				Level 2				Level 3				Total
Millions
Assets
Investments (a)
Available-for-sale – Equity Securities		$12.3			—				—					$12.3
Available-for-sale – Corporate and Governmental Debt Securities (b)	—					$8.3			—				8.3
Cash Equivalents	1.0				—				—				1.0
Total Fair Value of Assets		$13.3				$8.3			—					$21.6
Liabilities
Deferred Compensation (c)	—					$21.6			—					$21.6
Total Fair Value of Liabilities	—					$21.6			—					$21.6
Total Net Fair Value of Assets (Liabilities)		$13.3			$(13.3)				—				—
	Fair Value as of December 31, 2018
Recurring Fair Value Measures	Level 1				Level 2				Level 3				Total
Millions
Assets
Investments (a)
Available-for-sale – Equity Securities		$12.2			—				—					$12.2
Available-for-sale – Corporate and Governmental Debt Securities	—					$8.0			—				8.0
Cash Equivalents	1.0				—				—				1.0
Total Fair Value of Assets		$13.2				$8.0			—					$21.2
Liabilities
Deferred Compensation (c)	—					$19.8			—					$19.8
U.S. Water Services Contingent Consideration (d)	—				—					$3.8			3.8
Total Fair Value of Liabilities	—					$19.8				$3.8				$23.6
Total Net Fair Value of Assets (Liabilities)		$13.2			$(11.8)				$(3.8)				$(2.4)

(a) Included in Other Investments on the Consolidated Balance Sheet.

(b) As of March 31, 2019, the aggregate amount of available-for-sale corporate and governmental debt securities maturing in one year or less was $1.7 million, in one year to less than three years was $4.0 million, in three years to less than five years was $1.8 million and in five or more years was $0.8 million.

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

(d) Included in Other Current Liabilities on the Consolidated Balance Sheet.

Financial Instruments [Table Text Block]

Financial Instruments	Carrying Amount		Fair Value
Millions
Long-Term Debt, Including Long-Term Debt Due Within One Year
March 31, 2019	$1,549.0		$1,639.5
December 31, 2018	$1,495.2		$1,534.6

X

- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13467-108611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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- References

No definition available.

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X

- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258

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