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Capitalization And Short-Term Borrowings (Tables)
 12 Months Ended
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary Of Changes In Common Stock Equity
Summary of Changes in Common Stock Equity
 
Common Stock
 
Paid In
Capital
 
Earnings
Reinvested
in the
Business
 
Accumulated
Other
Comprehensive
Income (Loss)
Shares
 
Amount
 
 
(Thousands, except per share amounts)
Balance at September 30, 2014
84,157

 
$
84,157

 
$
716,144

 
$
1,614,361

 
$
(3,979
)
Net Income (Loss) Available for Common Stock
 
 
 
 
 
 
(379,427
)
 
 
Dividends Declared on Common Stock ($1.56 Per Share)
 
 
 
 
 
 
(131,734
)
 
 
Other Comprehensive Income, Net of Tax
 
 
 
 
 
 
 
 
97,351

Share-Based Payment Expense(2)
 
 
 
 
2,207

 
 
 
 
Common Stock Issued Under Stock and Benefit Plans(1)
437

 
437

 
25,923

 
 
 
 
Balance at September 30, 2015
84,594

 
84,594

 
744,274

 
1,103,200

 
93,372

Net Income (Loss) Available for Common Stock
 
 
 
 
 
 
(290,958
)
 
 
Dividends Declared on Common Stock ($1.60 Per Share)
 
 
 
 
 
 
(135,881
)
 
 
Other Comprehensive Loss, Net of Tax
 
 
 
 
 
 
 
 
(99,012
)
Share-Based Payment Expense(2)
 
 
 
 
4,843

 
 
 
 
Common Stock Issued Under Stock and Benefit Plans(1)
525

 
525

 
22,047

 
 
 
 
Balance at September 30, 2016
85,119

 
85,119

 
771,164

 
676,361

 
(5,640
)
Net Income Available for Common Stock
 
 
 
 
 
 
283,482

 
 
Dividends Declared on Common Stock ($1.64 Per Share)
 
 
 
 
 
 
(140,090
)
 
 
Cumulative Effect of Adoption of Authoritative Guidance for Stock-Based Compensation
 
 
 
 
 
 
31,916

 
 
Other Comprehensive Loss, Net of Tax
 
 
 
 
 
 
 
 
(24,483
)
Share-Based Payment Expense(2)
 
 
 
 
10,902

 
 
 
 
Common Stock Issued Under Stock and Benefit Plans
424

 
424

 
14,580

 
 
 
 
Balance at September 30, 2017
85,543

 
$
85,543

 
$
796,646

 
$
851,669

(3)
$
(30,123
)
 
(1)
Paid in Capital includes tax benefits of $1.9 million and $9.1 million for September 30, 2016 and 2015, respectively, related to stock-based compensation.
(2)
Paid in Capital includes compensation costs associated with stock option, SARs, performance share and/or restricted stock awards. The expense is included within Net Income Available For Common Stock, net of tax benefits.
(3)
The availability of consolidated earnings reinvested in the business for dividends payable in cash is limited under terms of the indentures covering long-term debt. At September 30, 2017, $707.5 million of accumulated earnings was free of such limitations.
Schedule Of Share-Based Compensation For Stock Options
Transactions involving option shares for all plans are summarized as follows:
 
Number of
Shares Subject
to Option
 
Weighted
Average
Exercise Price
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
(In thousands)
Outstanding at September 30, 2016
19,000

 
$
39.48

 
 
 
 
Granted in 2017
—

 
$
—

 
 
 
 
Exercised in 2017
(19,000
)
 
$
39.48

 
 
 
 
Forfeited in 2017
—

 
$
—

 
 
 
 
Outstanding at September 30, 2017
—

 
$
—

 
—

 
$
—

Option shares exercisable at September 30, 2017
—

 
$
—

 
—

 
$
—

Shares available for future grant at September 30, 2017(1)
2,182,243

 
 
 
 
 
 
 
(1)
Includes shares available for options, SARs, restricted stock and performance share grants.
Schedule Of Share-Based Compensation For SARs
Transactions involving SARs for all plans are summarized as follows:
 
Number of
Shares Subject
To Option
 
Weighted
Average
Exercise Price
 
Weighted
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
(In thousands)
Outstanding at September 30, 2016
1,590,988

 
$
48.19

 
 
 
 
Granted in 2017
—

 
$
—

 
 
 
 
Exercised in 2017
(82,077
)
 
$
39.77

 
 
 
 
Forfeited in 2017
—

 
$
—

 
 
 
 
Expired in 2017
(3,000
)
 
$
52.10

 
 
 
 
Outstanding at September 30, 2017
1,505,911

 
$
48.64

 
2.52
 
$
13,144

SARs exercisable at September 30, 2017
1,505,911

 
$
48.64

 
2.52
 
$
13,144
Schedule Of Share-Based Compensation For Restricted Share Awards
Transactions involving restricted share awards for all plans are summarized as follows: 
 
Number of
Restricted
Share Awards
 
Weighted Average
Fair Value per
Award
Outstanding at September 30, 2016
20,000

 
$
47.46

Granted in 2017
—

 
$
—

Vested in 2017
—

 
$
—

Forfeited in 2017
—

 
$
—

Outstanding at September 30, 2017
20,000

 
$
47.46
Schedule Of Share-Based Compensation For Non-Performance Based Restricted Stock Units
Transactions involving non-performance based restricted stock units for all plans are summarized as follows:
 
Number of
Restricted
Stock Units
 
Weighted Average
Fair Value per
Award
Outstanding at September 30, 2016
239,151

 
$
49.67

Granted in 2017
87,143

 
$
52.13

Vested in 2017
(80,530
)
 
$
53.38

Forfeited in 2017
(12,565
)
 
$
53.75

Outstanding at September 30, 2017
233,199

 
$
48.99
Schedule of Share-based Compensation for Performance Shares
Transactions involving performance shares for all plans are summarized as follows:
 
Number of
Performance
Shares
 
Weighted Average
Fair Value per
Award
Outstanding at September 30, 2016
438,234

 
$
44.98

Granted in 2017
184,148

 
$
56.39

Vested in 2017
(43,484
)
 
$
69.13

Forfeited in 2017
(51,150
)
 
$
60.74

Outstanding at September 30, 2017
527,748

 
$
45.44
Schedule Of Long-Term Debt
The outstanding long-term debt is as follows:
 
At September 30
 
2017
 
2016
 
(Thousands)
Medium-Term Notes(1):
 
 
 
7.4% due March 2023 to June 2025
$
99,000

 
$
99,000

Notes(1)(3)(4):
 
 
 
3.75% to 8.75% due April 2018 to September 2027
2,300,000

 
2,000,000

Total Long-Term Debt
2,399,000

 
2,099,000

Less Unamortized Discount and Debt Issuance Costs
15,319

 
12,748

Less Current Portion(2)
300,000

 
—

 
$
2,083,681

 
$
2,086,252

 
(1)
The Medium-Term Notes and Notes are unsecured.
(2)
Current Portion of Long-Term Debt at September 30, 2017 consisted of $300.0 million of 6.50% notes scheduled to mature in April 2018. The Company redeemed these notes on October 18, 2017 for $307.0 million, plus accrued interest. The call premium was recorded to Unamortized Debt Expense on the Consolidated Balance Sheet in October 2017.
(3)
The holders of these notes may require the Company to repurchase their notes at a price equal to 101% of the principal amount in the event of both a change in control and a ratings downgrade to a rating below investment grade.
(4)
The interest rate payable on $300.0 million of 3.95% notes will be subject to adjustment from time to time, with a maximum of 2.00%, if certain change of control events involving a material subsidiary result in a downgrade of the credit rating assigned to the notes to below investment grade (or if the credit rating assigned to the notes is subsequently upgraded).
Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Weighted Average Assumptions Used in Estimating Fair Value
The following assumptions were used in estimating the fair value of the TSR performance shares at the date of grant:
 
Year Ended September 30
 
2017
 
2016
 
2015
Risk-Free Interest Rate
1.54
%
 
1.26
%
 
1.01
%
Remaining Term at Date of Grant (Years)
2.79

 
2.79

 
2.78

Expected Volatility
22.6
%
 
20.5
%
 
20.1
%
Expected Dividend Yield (Quarterly)
N/A

 
N/A

 
N/A