Common Share and Earnings Per Common Share (Narrative) (Details) - USD ($) shares in Millions	3 Months Ended
Feb. 28, 2019	Jan. 31, 2019
Earnings Per Share [Abstract]
Share repurchase program, authorized amount		$ 500,000,000.0
Stock repurchased during period (in shares)	9.6
Stock repurchased during period	$ 194,700,000
Remaining authorized repurchase amount	$ 305,300,000

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Subparagraph (SX 210.5-02(28))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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